Home Postcode finder QLD Long Flat Long Flat postcode QLD Long Flat is a locality in Queensland covered by postcode 4570. Postcode 4570 State or territory Queensland (QLD) Region Sunshine Coast Add a free Long Flat business listing Be the first listing in Long Flat Common questionsWhat is the postcode for Long Flat?Long Flat, QLD has the postcode 4570.What state is Long Flat in?Long Flat is in Queensland (QLD).Does postcode 4570 cover more than one suburb?Yes. Postcode 4570 covers 85 localities, so the postcode alone does not identify Long Flat. Browse other postcodes in Queensland, or widen the search to every Australian postcode.